Journal of Inorganic Materials ›› 2019, Vol. 34 ›› Issue (10): 1109-1114.DOI: 10.15541/jim20190067

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Synthesis and Evaluation of Ca-doped Sr2Fe1.5Mo0.5O6-δ as Symmetrical Electrodes for High Performance Solid Oxide Fuel Cells

XIA Tian1,2,MENG Xie1,LUO Ting1,ZHAN Zhong-Liang1()   

  1. 1. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-02-13 Published:2019-09-23 Online:2019-05-29
  • Supported by:
    National Natural Science Foundation of China(51672298, 51702344, 51737011);The State of Grid(SGSDJN00FZQT1700446)

Abstract:

A series of Ca-substituted Sr2Fe1.5Mo0.5O6-δ oxides, Sr2-xCaxFe1.5Mo0.5O6-δ (SCFMO, x=0, 0.2, 0.4 and 0.6), were synthesized and evaluated as potential electrodes for symmetrical solid oxide fuel cells. X-ray diffraction examination showed that all samples maintained cubic perovskite structure in both air and wet hydrogen atmospheres. Temperature programmed reduction measurements indicated that the Ca 2+ substitution promoted the catalytic activity of SCFMO toward oxygen evolution reactions. Symmetrical anode fuel cell measurements showed the lowest polarization resistance in humidified hydrogen emerged at x=0.6. Single cells-SC0.6FMO|La0.9Sr0.1Ga0.8Mg0.2O3(LSGM)|SC0.6FMO, fabricated via tape-casting and impregnation methods, produced peak power densities of 1.05 W·cm -2 at 800 ℃ and 0.41 W·cm -2 at 650 ℃ when operating on hydrogen fuels and air oxidants. These results demonstrate SC0.6FMO is a potential electrode material for symmetrical solid oxide fuel cells.

Key words: Symmetrical Solid Oxide Fuel Cells, perovskite, electrode materials

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